Wizard, my sympathies go out to your regarding your neighbors. Something very similar happened to a friend of mine here. The more my friend complained about the neighbor's bad behavior, the more vengeful the neighbor got. In my friends case, his worst case scenario came true. He finally gave up and sold his house after 5 years of fighting the neighbors and 5 years worth of noise, trespassing and nuisance complaints. I really hope nothing like this happens to you. Hopefully between the new ordinance and the dust prevention ordinance you'll be able to get them to cease and desist.